The origin of this kink is not clear, though it seems the attraction of licking a lover's eyeball is the trust and intimacy implied in the act.

Should you like to try it, remember that direct contact to the iris may be significantly more awkward or painful than licking the side of the eyeball. One should remember to liberally rinse their mouth with water, so as not to transfer spice or citrus or other painful foodstuffs to the eyeball. Also of note: oral herpes can be transferred through the eye.